Chapter 50: Sensory and Motor Mechanisms

Question 0

True or false: receptor potentials are all or nothing events

Answer 0

False, graded

Question 1

True or false: action potentials are all or nothing events

Answer 1

True

Question 2

How does the brain distinguish sensory stimuli?

Answer 2

By the path b which they arrive

Question 3

Mechanoreceptors

Answer 3

Sense physical deformation caused by forms of mechanical energy like pressure, touch, stretch, motion, sound: often linked to ion channels and hairs: hair movement changes permeability of ion channels

Question 4

Chemoreceptors

Answer 4

Include general receptors that transmit info about total solute concentration and specific receptors that respond to individual kinds of molecules: ex: osmoregulators for thirst

Question 5

Electromagnetic receptors

Answer 5

Detect virus forms of electromagnetic energy, like visible light, electricity, magnetism; ex: snakes and infrared to detect pretty body heat, magnetic lines for migration, etc.

Question 6

Thermoreceptors

Answer 6

Detect heat and cold, located in skin and anterior hypothalamus